Add option to not verify an SSL certificate

Low hanging fruit.

We gave the 1.2.5 + S3 package to Patrice @ ABS (iirc?) to play with. It is not working for him b/c the S3 boxes he's using (some on-prem WD boxes that impl S3 protocol) have SSL certs that can't be verified.

Using the libmarias3 lib directly and setting S3NOVERIFY=1, he can interact with it. SM doesn't currently have the option to do that, but should have one. Just needs to know to init the S3 lib with that var or not, don't have to implement anything substantial.